This example uses a scatterplot matrix to compare four leaf trait measurements—Solidity, StochasticConvexity, AspectRatio, and Elongation—across different leaf classes. It constructs multiple small multiples, each visualizing the relationship between two traits from the provided `data.csv` dataset. The code loads the data with `d3.csv`, creates scales with `scaleLinear`, and appends axes using `axisBottom` and `axisLeft`. Circles represent individual specimens, and the SVG layout dynamically positions each cell based on its row and column.